Chewing differences in consumers affect the digestion and colonic fermentation outcomes: in vitro studies

Area of Science:

• Food science and nutrition
• Gastroenterology
• Microbiome research

Background:

• Consumer chewing behavior varies significantly, influencing food functionality and target consumer segments.
• Understanding this variability is crucial for designing effective food products.
• Individual differences in chewing impact digestion and gut health outcomes.

Purpose of the Study:

• To investigate the influence of chewing behavior on gastrointestinal digestion and colonic fermentation.
• To identify specific chewing parameters affecting digestive and fermentative outcomes.
• To explore the potential of modifying chewing as a strategy for health management.

Main Methods:

• Selected 29 participants with diverse chewing patterns from a larger cohort.
• Utilized in vitro models with brown rice as a model food.
• Measured chewing behavior via video observation and analyzed digestive and fermentative outcomes.

Main Results:

• Significant inter-individual differences in chewing behavior and outcomes were observed, affecting carbohydrate digestibility.
• Chewing variations influenced in vitro microbial composition and organic acid metabolite production.
• Chewing time per mouthful, bolus particle size (>2 mm), and saliva addition were key factors.

Conclusions:

• Chewing behavior significantly modulates in vitro gastrointestinal digestion and colonic fermentation.
• Modifying chewing patterns may offer a non-dietary strategy to control blood glucose and shape gut microbiota.
• Further in vivo studies are needed to validate these in vitro findings.